1,720,989 research outputs found
Vibriosis pada pendederan ikan kerapu Bebek Cromileptes altivelis di Pulau Payung Kepulauan Seribu
Full text linkVibriosis is a major disease occurred in grouper Cromileptes altivelis culture. This research was conducted s to isolate causative agents of vibriosis in nursery of grouper, as well as the pathogenecity of isolated bacteria in juvenile of grouper. We isolated three Vibrio, namely Vibrio sp. 1, Vibrio sp. 2, and Vibrio sp. 3. All isolated Vibrio are pathogenic to juvenile of grouper since challenge test of Vibrio sp. 1, 2 and 3 caused mortality of 100%, respectively after 10 days of infection. The clinical signs that appear on grouper are bleeding operculum, swelling of anus, and porous of fin. The results of histopathological analysis showed damage of the kidneys. The damage suffered were necrosis, degeneration, hemorrhage, and hyperthropy
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Cover Jurnal Perikanan Vol 13 no 3
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Study of Supplementation of Dietary Probiotic, Prebiotic, and Synbiotic to Precaution Vibriosis in Polkadot Grouper (Cromileptes altivelis).
No full textVibriosis was a major bacterial diseases in grouper fingerlings and very harmful. One of the diseases that often attack the humpback grouper fish was bacterium V. alginolyticus. V. alginolyticus attack on marine fish could reach up to 100% mortality. Application of probiotics, prebiotics and synbiotic through feed was expected to be one of the ways to boost the immune system of the fish. This study aimed to assess the effect of probiotics, prebiotics, and synbiotic on humpback grouper feed for vibriosis infection prevention through observation of immune response, survival and growth performance. The research covers the preparation stage and the media container maintenance, preparation of probiotic, preparation of prebiotic, feed preparation, testing probiotic, prebiotic, and synbiotic through the feed. There were five tests in the commission of the feed, feeding without probiotic, prebiotic, and synbiotic and PBS injected, feeding without probiotic, prebiotic, and synbiotic and infected V. alginolyticus, feeding of 1% with probiotic and infected V. alginolyticus, feeding of 2% prebiotic and infected V. alginolyticus, feeding with probiotics 1% and prebiotics 2 % and infected V. alginolyticus. Challenge test was injecting V. alginolyticus intramuscularly. Testing the performance of growth at the end of treatment probiotic, prebiotic, and synbiotic by measuring the daily growth rate and feed conversion ratio. Immune response testing was also conducted by measuring the total erythrocytes, total leukocytes, hemoglobin, hematocrit, respiratory burst activity, phagocytic activity and total bacteria. The characterization of probiotic was conducted by Cowan. The result showed that the bacterium was Bacillus sp. The result of oligosaccharide extraction (TPT 5%) used in this study consist of 1.115% inulin; 1.015% FOS and 1.488% GOS. Feeding with the addition of probiotic, prebiotic, and synbiotic for thirty days can increase the survival rate and growth performance (DGR and FCR) and resistance to disease. Overall immune response results obtained in this study showed significant improvement between the administration of probiotics, prebiotics, and synbiotic to control
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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